OASIS Mailing List ArchivesView the OASIS mailing list archive below
or browse/search using MarkMail.


Help: OASIS Mailing Lists Help | MarkMail Help



   Common event-based parser API

[ Lists Home | Date Index | Thread Index ]
  • From: David Megginson <ak117@freenet.carleton.ca>
  • To: xml-dev Mailing List <xml-dev@ic.ac.uk>
  • Date: Tue, 16 Dec 1997 07:12:02 -0500

Tim and I have taken some of the gritty details of our discussion
offline, and we have not yet managed to agree on how to return
character data; however, I do agree that attributes should be returned
somehow in the startElement() event rather than passed as separate
events, so I'd like to propose this:

startElement(XmlParser p, String elname, java.util.Dictionary attributes)

Note the use of the Dictionary abstract base class here.  Hashtable is
derived from Dictionary, as is my Trie class that I released a
couple of years ago.  There are a couple of advantages to this

1) It can be implemented efficiently, without requiring allocation of
   a hash table: you could return anything derived from
   java.util.Dictionary, including a simple sequential lookup in an
   array of attributes.

2) It makes the users' work much easier, since they can just use

      * Handle the start of an element.
    startElement (XmlParser p, String elname, Dictionary attributes)
      String id = (String)attributes.get("id");
      String role = (String)attributes.get("role");


   (instead of)

      * Handle the start of an element.
    startElement (XmlParser p, String elname, Attribute attributes[])
      String id = null;
      String role = null;

      for (int i = 0; i < attributes.length; i++) {
        if (attributes[i].getName().equals("id")) {
          id = attributes[i].getValue();
        } else if (attributes[i].getName().equals("role")) {
          role = attributes[i].getValue();



All the best,


David Megginson                 ak117@freenet.carleton.ca
Microstar Software Ltd.         dmeggins@microstar.com

xml-dev: A list for W3C XML Developers. To post, mailto:xml-dev@ic.ac.uk
Archived as: http://www.lists.ic.ac.uk/hypermail/xml-dev/
To (un)subscribe, mailto:majordomo@ic.ac.uk the following message;
(un)subscribe xml-dev
To subscribe to the digests, mailto:majordomo@ic.ac.uk the following message;
subscribe xml-dev-digest
List coordinator, Henry Rzepa (mailto:rzepa@ic.ac.uk)


News | XML in Industry | Calendar | XML Registry
Marketplace | Resources | MyXML.org | Sponsors | Privacy Statement

Copyright 2001 XML.org. This site is hosted by OASIS